47 lines
1.7 KiB
YAML
47 lines
1.7 KiB
YAML
id: k8s-netpol-egress-rules
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info:
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name: Network policies define egress rules
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author: princechaddha
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severity: medium
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description: Checks for network policies in Kubernetes that do not define egress rules, which can leave the network exposed to external threats.
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impact: |
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Lack of egress rules in network policies can result in unrestricted outbound network traffic, which may allow data exfiltration or unauthorized access to external services.
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remediation: Define egress rules in all network policies to control outbound traffic from your Kubernetes pods, thereby reducing security risks.
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reference:
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- https://kubernetes.io/docs/concepts/services-networking/network-policies/
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tags: cloud,devops,kubernetes,devsecops,k8s,k8s-cluster-security
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flow: |
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code(1);
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for (let policy of template.items) {
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set("policy", policy)
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javascript(1);
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}
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self-contained: true
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code:
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- engine:
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- sh
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- bash
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source: kubectl get networkpolicies --all-namespaces --output=json
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extractors:
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- type: json
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name: items
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internal: true
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json:
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- '.items[] | {policy: .metadata.name, egress: .spec.egress}'
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javascript:
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- code: |
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let policyData = JSON.parse(template.policy);
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if (!policyData.egress || policyData.egress.length === 0) {
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let result = (`Network policy '${policyData.policy}' does not define egress rules.`);
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Export(result);
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}
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extractors:
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- type: dsl
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dsl:
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- response
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# digest: 4a0a00473045022100cab8502b8046e7ecf04c896fd8367a118f6fa5f4a4b29b06f90a31e4c7e2bc910220761d406117dce7f3116e5426ad24d79d82a1e9e6161fa944fa8195c498144eda:922c64590222798bb761d5b6d8e72950 |